Please do NOT move this post or merge it. The issue we have is NOT the same. This issue is NOT related to other software. The problem is WMP opening, editing, and ultimately corrupting the MP3. If this thread gets merged, Microsoft will be able to more easily continue to deny they still have serious issue with WMP. I have already tried a "diagnostic startup", as well as running SFC ( from my initial post) neither of which did exactly SQUAT to fix this problem. THE ONLY thing that has worked to date is to completely REPLACE the corrupt MP3 files with a known working backup. WMP then plays correctly until it corrupts them again.
On a side note, disabling legitimate software, that has been written to MS spec, in order to make an operating system work correctly is not a valid solution in my book. This indicates to me that the operating system, and ultimately Microsoft is to blame. I also have a sneaking suspicion that if Microsoft could firmly lay the blame on somone else for this they would have gladly and vocally done so by now. Their silence indicates this is a known WMP issue, most likely similar or even the very same to the one I referenced earlier in this thread. WMP is busted, MS needs to acknowledge, then fix it.
Sorry, you're right. In attempting to track down the several threads with "Server Execution Failed", I attempted to pull yours in by mistake. I would have responded sooner, but for some reason I'm not getting the email notifications.
I would still suggest running the MSConfig util, and attempting to boot with only critical items. It might have given my system time to resolve whatever issues it was having, and I learned that "Free" antivirus=you get what you pay for.
On another note, I too use k-lite codec pack and CCCP. I switch between them from time to time. Technically speaking, if WMP runs fine w/o those installed, M$ has a right to punt. They only pull from a handful of licensed codecs for .MP3 and, of course, .WM* created content. Even if you were George Lucas calling M$ to complain about WMP not giving you THX quality audio playback, they would route you to whichever 3rd party codec was used to create you content if it isn't on their list. I also always disable the "Download Usage Rights Automatically" option. I also only update info that is missing. With 16,000+ MP3s and 4000 video files, my machine would be unusable for a week if it tried to update everything.
Both K-Lite and CCCP have hosed me on a few occasions. They are what they are, and usually are required for unpaid content.....freely distributed or otherwise. Some MP3 players might also use a janky codec, but most have a licensed version of a standard one when "certified" to run on WMP. I'm not implying anything, just that I would uninstall the codec packs first to rule out them as a problem. If you were paying the $99 support call fee or whatever by opening a M$ incident, they would make you do the same thing. (Which, as a side note, I would like to point out that this isn't the same as the M$ help desk. You don't have an "open ticket" with M$ at this point and there is no SLA in place. Depending on how you got your Win7 copy, you might get support from your vendor OR from MS directly via email support.)
Also, the clean boot (MSConfig) is NOT a solution. It is a troubleshooting tool that helps to rule out other items. If you run in a clean boot, and the MP3s don't get corrupted, then obviously something else is causing issues. That's how I resolved my WMP problem. Yes, it took me a few days to track it down, but it only really required an hour or so of interactive time changing the MSConfig options. It could be ZoneAlarm, it could be AVAST. They also push out automatic update that could cause problems. I couldn't tell from your response above if you actually completed a full clean boot with ALL non MS services disable and ALL startup programs cancelled. If you did, then I'd move on to uninstalling the codec packs. I'd also try changing the MP3 files all to Read-Only.